Thomas



(No Model.)

T. O. GOMSTOGK.

Watch Regulator. N0. 240,386. Patented April 19,188.

FEi IlIIiI-III S N. PETERS. PHOTO-LITHOGRAPHER. WASHlNGTON. D

UNITED STATE PATENT OFFICE.

THOMAS C. OOMSTOOK, OF INDIANAPOLIS, INDIANA, 'ASSIGNOR TO HIMSELF AND THOMAS H. BUTLER, OF SAME PLACE.

WATCH- REGULATO R.

SPECIFICATION forming part of Letters Patent No. 240,386, dated April 19, 1881.

Application filed May 10, 1880. (No model.)

To all whom it may concern:

Be it known that I, THOMAS C. OOMSTOGK, a citizen of the United States, residing at Indianapolis, in the county of Marion and State 5 of Indiana, have invented certain new and useful Improvements in Watches, of which the following is a specification.

My invention relates to improvements in watches in which a worm-screw and spur- 1 wheel operate in conjunction with a crank and the regulatiiiig-point, and the works are all inclosed in a dust-proof case; and the object of my improvement is to provide a means of regulatin g the watch from the outside without exposing the works to dust and. dirt. I attain this object by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is an enlarged face view of one side of the works of a watch, showing the arrange- 0 ment for adjusting the regulator. Fig. 2 is a vertical section of the inner cases. Fig. 3 is a section of the watch-case. Fig. at is a section of the outer case, partially broken away to show the position of the worm-screw and 2 5 milled head for operating the regulator from the outside of the inner cases; and Fig. 5 is a view showing a modified form of my device for operating the regulator.

Similar letters refer to similar parts through- 0 out the several views.

Arepresents the base of the movement. B is the milled knob used in winding the watch. 0 is the winding-stem.

The indicator-arm E of the regulator, Fig.

1, is pivoted to one end of the pitman G, and the other end of the pitman is pivoted to the disk H, which is secured to the top of the worm-wheel L. The worm-screw H on the shaft P works in gear with the worm or gear wheel L, as shown in Figs. 1 and 4.

The shaft P is inserted in the hole 1) of the case M, and the outer end of the shaft is provided with a milled head, F, which fits in a recess formed in the case A, as shown in Fig.

5 4. By means of this worm-screw and its connection with the arm E of the regulator the watch can be regulated to the utmost nicety.

The two cases M and M, which are the subject-matter of another application, and are therefore not broadly claimed in this application, are cylinders united together at the joint 70 perfectly tight.

0 represents a small hole through the cylinders at the joint k, in which the shaft 0 is inserted.

The upper case, M, is provided with a hole,

1), for the shaft P to operate in.

The top and bottom edges, h h, are formed with bezels for holding and retaining crystals or metal panels, thus forming a tight box.

The outer case, A, is similar to ordinary cases, with the exception that one side is provided with a stationary bezel, in which the case M is set.

That portion of the case A marked 19, is 6 provided with a hole, 12, to correspond with the hole 19 in the case M, in which the stem P is inserted.

10 represents a point on a block, w, which enters the groove 3 of the stem P and prevents said stem from pulling out, the same as the winding-stem. The block w operates in a hole formed in the case, and is supported by the spring 10 which is attached to the adjustable bloek 10 and the block 10 is adjusted up by the screw w, to remove the point 20 from the groove 3 in the shaft P, or is adjusted down by said screw to secure the said shaft.

The case A is provided with two screws, 1, in the rim 0 one on each side, the heads of which are used for binding the cases M M together, and inside of the rims o o of the case A.

The movement is first inserted in the case M, and then inserted in the case A, with the end It resting on the bezel o. The stem G is then inserted. The other case, M, is then placed over the case M, and the stem P is then inserted through the holes 1) p, and the worm K adjusted to work in gear with the wheel L. The milled head F is then inserted 0 in the recess 8 and secured to the shaft P by a screw, 8. The screws 1' are then turned around, so as to bind the two cases M M together and secure them in the case A, between the bezel o and said screw-heads. Thus the movement is securely inclosed in a perfectlytight case, and can be wound and set by the stem, as in ordinary stem-winding watches.

The regulating of the watch, however, is done outside by simply moving the head F of mo the worm-screw to the right or left, as the case may require. Thus when the shaft 1? is revolved the worm K turns the wheel L and the pitman G moves the indicator-point, also the arm E for lengthening or shortening the hairspring. (Not shown.) Thus the watch can be regulated to the utmost nicety without exposing the works to dust or dirt of any kind.

Fig. 5 represents a modified form of the regulator. In this case the regulator-arm E is provided with a short arm, 8 which projects from one side.

The wheel L is provided with a cam or eccentric, H, on top, the periphery of which 0perates against the arm 8 and the arm 8 is held in contact therewith by the spring S, as shown. The cam H is operated by the pinwheel L on the shaft P ,provided with a milled head, F, as shown.

It is obvious that if the wheel L is turned the wheel L is also moved, carrying with it the cam H and the cam moves the regulator E one way, while on thereverse movement the spring S makes the arm E follow the cam.

What I claim as new, and desire to secure by Letters Patent, is

1. In a watch, the shaft 1 provided with a worm-screw, K, combined with the wheel L, the pitman G, and regulating-arm E, substantially as described, for the purpose set forth.

2. In a watch, the combination of the case A, the spring-block w, the inner eases, M M, and movement A, provided with the regulating device P L G E, as and for the purpose specified.

8. In a watch, the regulating apparatus, consisting of the shaft P, milled head F, worm K, wheel L, crank G, and indicator-arm E, arranged and combined for regulating a watch without exposing its works to dust or dirt, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS C. COMSTOOK.

Witnesses:

E. 0. FRINK, G. H. BENNETT. 

